Nielsen Hayden genealogy
Descendants of (Unknown mistress of Godfrey of Brabant)
(Unknown mistress of Godfrey of Brabant)
Godfrey I of Brabant (Abt 1060 Louvain, Brabant, Belgium - 25 Jan 1139 Jerusalem)
   └─ Joscelin of Louvain (of Petworth, Sussex, England - 1180)
    Agnes de Percy ( - Bef 13 Oct 1204 bur.Whitby, Yorkshire, England)(m. Between 1154 and 1161)
       ├─ Henry de Percy (of Petworth, Sussex, England - Bef 29 Sep 1198)
       │ Isabel de Brus (of Skelton, Yorkshire, England - Aft 1230)
       │    └─ William de Percy (Abt 1193 of Topcliffe, Yorkshire, England -
       │     Bef 28 Jul 1245 bur.Sallay Abbey, Yorkshire, England) =>
       │     Bef 28 Jul 1245 bur.Sallay Abbey, Yorkshire, England) =>
       │     + Joan Briwerre ( - Bef 12 Jun 1233 bur.Hospital of Sandon, Surrey, England)(m. Abt 1226)
       │     + Ellen de Balliol (Abt 1200 of Alnwick, Northumberland, England - Bef 22 Nov 1281)(m. Abt 1233)
       └─ Maud de Percy
        John d'Eiville (of Egmanton, Nottinghamshire, England - Aft Jun 1228)
           └─ Robert d'Eiville (of Egmanton, Nottinghamshire, England - Aft 1242) =>
            + Denise Fitz William ( - Bef 1285)(m. Bef 1229)